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    Relationships of Vigna unguiculata (L) Walp., V. vexilata (L) A.Rich. and species of section Vigna based on isozyme variation

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    Date
    1996
    Author
    Sonnante, G.
    Piergiovanni, A.R.
    Ng, Q.N.
    Perrino, P.
    Type
    Journal Article
    Metadata
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    Abstract/Description
    Isozyme variation in 25 accessions of wild and cultivated Vigna unguiculata, 49 accessions of seven wild species belonging to section Vigna, and 11 accessions of V vexillata (subgenus Plectrotropis) was scored at 17 putative loci to assess genetic relationships within and among species. The wild species selected for this study are among those which carry important agronomical traits useful in cowpea (V unguiculata) breeding programs. Allelic frequencies were calculated and Nei's genetic distances were obtained. Low levels of intraspecific variation were observed for V heterophylla, V luteola and V racemosa, whereas the other species showed a higher polymorphism. Vigna unguiculata possessed intraspecific genetic distances comparable to those previously found by other authors. Most of the isozyme variation was apportioned among species. Although V luteola and V marina had an interspecific genetic distance resembling the range observed at intraspecific level, all the other species showed very high interspecific distances. Vigna unguiculata was relatively closer genetically to V vexillata than to the species belonging to section Vigna.
    https://doi.org/10.1007/BF00126759
    Multi standard citation
    Permanent link to this item
    https://hdl.handle.net/20.500.12478/5707
    Digital Object Identifier (DOI)
    https://doi.org/10.1007/BF00126759
    IITA Subjects
    Cowpea; Grain Legumes
    Agrovoc Terms
    Cowpeas; Isozymes; Relationship Scheme
    Regions
    Acp; Africa
    Countries
    Italy; Nigeria
    Collections
    • Journal and Journal Articles4835
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